Phylum:Chytridiomycota >> Class: Chytridiomycetes >>  Order: Chytridiales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Rhizophydium sphaerocarpum var. sphaerocarpum

Rhizophydium sphaerocarpum var. sphaerocarpum (Zopf) Rabenhorst. Kryptogamen-Fl.1(4):95. 1892.

 Description: On pine pollen: Zoosporangium epibiotic or interbiotic, spherical, 7.5-47.5 μm diam. Rhizoids arising from a delicate main axis, on sporangium base. Zoospores ooze through a wide apical pore in a loose mass, empty sporangium urceolate with one apical pore. Resting spores spherical, 12.5-17.5 μm diam., with a large centric globule, smooth wall.In 1/4 YpSs slush: Zoosporangium spherical, 22-27 μm diam., with a large apical or subapical exit pore, 9.9-12.4 μm diam., occasionally a very fine operculum-like structure was seen.Rhizoids from one fine axis, which is 19.7-54.3 μm long; extensive branching from distal end of rhizoidal axis.On 1/4 YpSs agar: Young sporangium with several oil globules, one thread-like main axis extending from sporangium base, sparingly branched. Zoospores globular, 4-5 μm diam., emerging through the apical portion of wall, becoming amoeboid, then swimming away. Empty sporangium urceolate. Color of colony buff to off-white.

Taiwan. Taipei: Yangmingshan Tatun Natural Park, water, 8 Apr 1991,Hsu 01; Pinghsi, water from stream, 16 Jul 1992, NTNU 101a; Nantou: Puli, waterfall, 20 July 1992, NTNU 201b; Chiayi: Alishan, spring water, 4 Aug 1992, NTNU 301a; Ilan: Harpen, lake water, 27 Mar 1993, NTNU 809a; Taichung: Tungshih woodland, lake water, 6 Sep 1994,NTNU 2301a; Hueysuen woodland, stream water, 21 Dec 1997, CSF 3302a. Isolated on pinepollen from all water samples.

 Habitat: Fresh water.

Germany, USA, Manchuria, Japan, Hungary, Latvia, Equatorial East Africa,South Africa, Sweden, Taiwan.


Barr, DJS. 1970; Chen, SF et al. 2000.


S. F. Chen

 Note: Ubiquitous. An urceolate empty sporangium and delicate slender rhizoids are the main characters. Physiological tests on our isolate indicate that the maximum temperature for growth is nearly 30 °C. According to color of colony, this isolate is identified R. sphaerocarpum var. sphaerocarpum. The above is similar to Barr‘s (1970) report.